<!DOCTYPE html>
<html>
<head>
  <meta charset="UTF-8"/>
  <title>500错误</title>
  <style type="text/css">
    .middle-box {
      max-width: 400px;
      z-index: 100;
      margin: 0 auto;
      padding-top: 40px;
    }

    .middle-box h1 {
      font-size: 170px;
      margin: 0px;
    }

    .text-center {
      text-align: center;
    }
  </style>
</head>
<body>
<div class="middle-box text-center">
  <h1>500</h1>
  <h3 class="font-bold">服务器内部错误！</h3>
  <div class="error-desc">
    服务器好像出错了...
  </div>
</div>
</body>
</html>